(Take and .) A satellite is placed in a circular orbit above Earth’s surface

PHYSICS · Single correct · A Level · Physics · Fields and their consequences · Fields and their consequences

Problem

(Take

G=6.67\times10^{-11}\,\text{N m}^2\text{/kg}^2

and

M_{\oplus}=5.97\times10^{24}\,\text{kg}

.) A satellite is placed in a circular orbit

700\,\text{km}

above Earth’s surface. If Earth’s radius is

6.4\times10^{3}\,\text{km}

, the orbital speed of the satellite is closest to (a)

10.6\,\text{km s}^{-1}

(b)

7.9\,\text{km s}^{-1}

(c)

7.5\,\text{km s}^{-1}

(d)

8.3\,\text{km s}^{-1}